Cable



y 1934- A. E. PAIGE 1,959,302

CABLE Filed Oct. 19. 1926 Patented May 15, 1934 CABLE Arthur E. Paige,Philadelphia, Pa., assignor to John Wood Manufacturing Company, Inc.,Conshohocken, Pa., a corporation of Delaware Application October 19,1926, Serial No. 142,576

3 Claims. (Cl. 13775.)

It is the object and effect of my invention to provide a flexible cableincluding one or more conduits enclosed in a heat insulating coveringcomprising a fabric coated or impregnated with a primarily liquidcomposition which, when desiccated, leaves a residual deposit upon suchfabric of material which is flame resistant and renders said coveringsubstantially fire proof. Said composition may be more or less flexiblein accordance with the nature and proportions of its ingredients; but,in any case, offers such resistance to the passage of electric curent asto be classed as a dielectric.

As hereinafter described, my invention includes a cable designed forsupplying a heating fluid to a radiator and returning the cooled fluidfrom the radiator to the source of heat; both of said conduits beingheat insulated in a single covering and, preferably, with one of theconduits extending inside of the other. Moreover, as hereinafterdescribed, my invention includes a cable comprising such conduits and,also, inclosing in the same heat insulating covering, a pair ofelectrical conductors. Such conductors being adapted to supply energy toelectric fan motors local to the radiators. However, the constructionand arrangement of such heating, radiating, and ventilating means arethe subject matter of U. S. Patent 1,667,430 of April 24, 1928, to V.Mauck, and I do not claim such organized apparatus.

My invention includes the various novel features of construction andarrangement hereinafter more definitely specified.

In said drawing: Fig. I is a cross sectional view of a cable comprisinga single metallic conduit with a tubular covering of fabric, coated orimpregnated with the heat insulating material aforesaid.

Fig. II is a fragmentary side elevation of the cable shown in Fig. I.

Fig. III is a cross sectional view of a cable including two metallicconduits with respective tubular fabric coverings and inclosed by asingle tubular fabric covering for its outer surface, coated orimpregnated with said heat insulating material.

Fig. IV is a fragmentary side elevation of the cable shown in Fig. III.

Fig. V is a cross sectional view of a cable, similar to that shown inFigs. III and IV, except that it also includes, within the same heatinsulating covering, a pair of electrical conductors.

Fig. VI is a fragmentary side elevation of the cable shown in Fig. V.

Fig. VII is a cross sectional view of a cable including two metallicconduits, one inside of the other, and having a single tubular fabriccovering,coated or impregnated with said heat insulating material.

Fig. VIII is a fragmentary side elevation of the cable shown in Fig.VII.

Fig. IX is a cross sectional view of a cable similar to that shown inFigs. VII and VIII, except that it also includes, within the same heatinsulating covering, a pair of electrical conductors.

Referring to the form of my invention shown in Figs. I and II; thetubular conduit 1 is conveniently formed of ductile metal, preferablyseamless, drawn or extruded copper. Said conduit is provided with thetubular textile covering 2 which may be formed apart from said conduitand thereafter fitted upon the conduit, but is, preferably, formeddirectly upon the conduit; conveniently by a circular weaving, braiding,or knitting'mechanism. As above described, such covering '2 is coatedwith heat insulating material, which impregnates the fabric of saidcovering, as indicated at 3, rendering said covering flame resistant andsubstantially fireproof. Such outer covering 3 is like varnish andoccludes air in the interstices of said fabric.

Referring to the form of my invention in Figs. III and IV; the cableincludes two conduits 4 and 5 respectively provided with fabriccoverings6 and 7, similar to the covering above described.

However, both of said conduits are also incased in the outer heatinsulating covering 8, which is a tubular fabric formed separately fromsaid conduits or directly upon the same, as above contemplated. As abovedescribed, said covering 8 is coated with heat insulating material,which impregnates the fabric of said covering, as indicated at 9,rendering said covering flame resistant and substantially fireproof.Such outer coating 9 occludes the air in the interstices of said fabric.Although in Fig. IV the conduits 4 and 5 extend in parallel relation; itis to be understood that they may be twisted around the axis of thecable, as indicated by the outer circle in Fig. III.

In the form of my invention shown in Figs. V and VI; a cable includingthe several elements above described with reference to Figs. III and IValso includes, within its outer heat insulating covering 8, (coated withheat insulating material 9 as aforesaid) the pair of electricalconductors l0 and 11, which may be strands of copper wire each providedwith individual insulating coverings 12 and 13.

In the form of my invention shown in Figs. VII and VIII; the cableincludes the conduit 15 -sulating coverings 21 and 22.

extending within the conduit 16 and incased by the single heatinsulating covering 17, which is a tubular fabric impregnated with heatinsulating material, as above contemplated, and as indicated at 20.Although said conduits 15 and 16 are shown in coaxial relation; ofcourse, the inner conduit 15 is deflected against the inner surface ofthe conduit 16 whenthe cable is bent. Such freedom for lateral movementof the conduit 15 within the conduit 16 is advantageous in affordinggreater flexibility of the entire structure than if means were providedto maintain said conduits in coaxial relation. However, it may beobserved that such displacement of the conduit 15 does not vary the areaof the space between the outer surface of the conduit 15 and the innersurface of the conduit 16 which affords a passage way for the return ofthe fluid which is primarily conveyed through the conduit 15 to theradiator above contemplated. Of course, the heated fluid may be suppliedthrough the space aforesaid, between said conduits l5 and 16, and thecooled fluid returned through the conduit 15. However, the arrangementfirst described is preferable, as far as heat losses to the outeratmosphere areconcerned.

In the form of my invention shown in Fig. IX; the cable includes theelements above described with reference to Figs. VII and VIII, and alsoincludes Within the outer covering 17 a pair of electrical conductors 18and 19 havingrespective in- I find it convenient to manufactureprimarily liquid heat insulating material aforesaid by mixing equalparts of Water and the ordinary commercial aqueous solution of sodiumsilicate. Allowing said mixture to stand, or preferably, agitating it,until it becomes a substantially uniform colloid solution. Thereupon,adding to said solution 5% or more of a liquid diluent, bindingmaterial, the principal function of which is to render the residue ofthe desiccated liquid so far flexible that it does not crack when thefabric upon which it is deposited is bent. Such flexible binding,material for the sodium silicate residue may beformed by mixing with theaqueous solution aforesaid 5%, more or less, of any suitable cellulosesulphocarbonate or thiocarbonate of the series known commercially asviscose and which coagulate from their liquid state to form impurecellulose hydrate complexes, which are not soluble in water and hold thesilicate in colloid solution adherent to the fabric, when appliedthereto as above described. However, any suitable par aform formaldehydemay be used in lieu of the viscose in said mixtures. For instance,hexamethylene-amin (CH2) 6N4 forms an infusible, involatile, adherentcoating which is insoluble in water and resists abrasion to a greaterdegree than the sodium silicate per se. Such mixtures are of aconsistency of ordinary varnish and may be applied by any means whichmay be used for applying varnish and with the effect of coating andimpregnating the textile fabric insulating coverings above contemplatedand occluding air in the pores and interstices of such fabric.

Moreover, glycerin may be used in the primary liquid aforesaid, say 5%,more or less, thereof, to impart flexibility to the residue ofdesiccated silicate; if it is desired to render such residue soluble inwater. 7

Therefore, I do not desire to limit myself to the specific proportionsor method of procedure herein set forth as it is obvious that variousmodifications may be made therein without departing from the essentialfeatures of my invention as defined in the appended claims.

I claim: 7

.1. In a flexible pipe, the combination with a flexible imperforatemetallic tubular conduit; of a second flexible imperforate metallictubular conduit extending in said first conduit in laterally spacedrelation therewith, forming a passageway between said conduits, saidinner conduit being free for lateral movement within the outer conduitto afford maximum flexibility of thestructure; a heat insulatingcovering for said outer conduit including a seamless tube of fibrousmaterial, capable of occluding air; and an outer coating of flexible,plastic, heat insulating material, rendering said covering flameresistant and substantially fireproof.

2. In a flexible pipe, the combination with a flexible imperforatemetallic tubular'conduit; of a heat insulating covering for said conduitincluding a seamless tube of fibrous material capable of occluding air;and an outer coating of flexible, plastic, heat insulating material,rendering said covering flame resistant and substantially fireproof;including a metallic wire extending longitudinally between said metallictubular conduit and the heat insulating covering for said conduit; anddi-electric means separating said wire from said conduit.

3. A structure as in claim' 1, including a plurality of wires extendinglongitudinally between said outer metallic tubular conduit and the heatinsulating covering for said conduit upon opposite sides of saidconduit, said structure being of different diameters in transverserelation and less resistant to flexure thereof in the plane of itsminimum diameter than in the plane of its maximum diameter.

ARTHUR E. PAIGE-n

